Improvement in flexible gas-tubing



W. BOURGIGNON. PlexibleGas Tubing.

No. v207,489. Patented Aug. 27, 1878.

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UNITED STATES PATENT OFFTCE.

WENDEL BOURGUIGNON, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO ROBERT GEMS, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN FLEXIBLE GAS-TUBING.

Specification Forming part of-Letters Patent No. 207,489, dated August 7, 1878; application ilcd May 14, 1878.

ingis a full, clear, and exact description of the construction and operation of the same, reference being had to the annexed drawm gs, making a part of this specitcation, and to the letters' and figures otl reference marked thereon.

Figure l of the drawing is a representation of a perspective view of my invention with the outer covering partially removed. Fig. 2

is a similar .vie-w, with the outer covering removed and a portion of each of. the under coverings or layers partially broken away, and l Fig. 3 is avertical longitudinal sect-ion of the This invention has relation to the manufacture of flexible tubing; and the object or purpose thereof is to provide a tubing that will be perfectly gas-tight or impervious to any of the aeriform tluids passing through it, and at the same timeretaining its required iieXibility.

The invention therefore consists in a covering of leaf or sheet lead interposed between a covering of fibrous material and a covering of elastic material, as will be hereinafter described.

In the accompanying drawings, A represents the tubing, consisting of a core composed of a spiral wire coil, a, which may have, if desired, acovering, t, ot cotton braid or other suitable librous material. Over .this is placed a covering of leaf or sheet lead, c, the purpose of which is to protect the covering of rubber or .other elastic material d. Above it, and over the elastic coverinfhis still another covering, e, of brous braid, and over this an outer covering of iibrons braid,or any other suitable material generally used to vgive the tubing an ornamental or neat appearance.

I do not wish to be understood,however,as confining myself to the number of coverings shown and described, or the material from which they are made, as the ibrous coverings may be knit, braided, or plain, and in place of the rubber a layer or sheet of an elasticvarnish or cement may be used, as my invention consists, principally, in the sheet-lead covering as a material to protect the elastic substance from the gas or its deposits, and also in the inner covering of fibrous material to protect the lead from the action of the gas, and thus form a perfectly air-tight tubing.

It will be readily understood Why a tubing used to conduct gas should be absolutely impervious thereto, as those familiar with the use of ilexible tubing as a means of conducting gas to the burner are well aware that if the tubing is in the least incapable of holding the gas, or preventing it from penetrating the several coverings, a disagreeable smell of gasr is the consequence, and becomes as offensive and objectionable as a gas-tubing which is in reaL ity pervious and leaky.

The use of sheet-lead between the wire coil and the covering of elastic material renders the tubing perfectly gastight, and prevents the possibility ot' the escape of thc gas.

Having now fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

A flexible tubing consisting of a spiral wire coil, a covering of -fibrous material, and

a covering of lead between said brous covering and a covering of elastic material, subA stantially as and for the purpose specified.

In Vtestimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses.

WENDEL BOURGUIGNON.

Witnesses:

A. SHEFFIELD ARNOLD, HENRY VALI-Iow. 

